This recipe is altered very slightly from Your Cup of Cake. I added more milk to the frosting because I like a really light, almost whipped frosting -- it helps cut down on the richness of the chocolate.
I used the leftover brownie mix from the frosting to bake the brownie topping. I used a round pan to reduce the harder edges, which helped when crumbling the brownies for garnish.
BROWNIE BATTER CUPCAKES
INGREDIENTS
Cake
1 box Devil's Food Cake Mix
1/2 cup unsalted butter (softened)
3 large eggs
2 teaspoons vanilla extract
3/4 cup milk
1/2 cup sour cream
1/2 cup miniature milk chocolate chips
Frosting
1 cup butter (softened)
1/2 cup chocolate brownie mix
1/3 cup unsweetened cocoa powder
2 teaspoons vanilla extract
2 tablespoons milk (more if needed)
3 cups powdered sugar
DIRECTIONS
Cupcakes
Preheat oven to 350F.
Line cupcake pan (24-count)
In the bowl of a stand mixer (with paddle attachment), combine cake mix, butter, eggs, vanilla extract, milk, and sour cream until smooth.
Stir in miniature chocolate chips.
Fill cupcake liners 2/3 full.
Bake 15-20 minutes (until toothpick comes out clean).
Remove from oven, let rest for 2-3 minutes, then transfer cupcakes to wire rack to cool.
Frosting
In stand mixer (with paddle attachment), beat butter until smooth.
Add brownie mix, cocoa powder, vanilla, and milk and beat until combined.
Slowly add in powdered sugar until you reach your desired consistency. Add more milk if it becomes too thick.
Pipe onto cupcakes. Top with crushed brownie pieces for additional flavor.